!!! Your current profile is deprecated and not supported anymore.
!!! Please upgrade to the following profile if possible:
default/linux/x86/10.0
To upgrade do the following steps:
# Check 'eselect profile list'.
# Find the number that corresponds with the default/linux/x86/10.0 profile.
# Use 'eselect profile set <number>' to set a new /etc/make.profile symlink.
#
# Reference: http://www.gentoo.org/doc/en/gentoo-upgrading.xml
# See: "General instructions" in Section 3. "Profile updating instructions"
A new version of portage is available, this will be installed now.
emerge portage...
!!! Your current profile is deprecated and not supported anymore.
!!! Please upgrade to the following profile if possible:
default/linux/x86/10.0
[ebuild NS ] dev-lang/python-2.6.6-r2 [2.5.2-r7] USE="gdbm ipv6 ncurses readline ssl threads (wide-unicode) xml -berkdb -build -doc -examples -sqlite -tk -wininst"
[ebuild U ] sys-apps/portage-2.1.9.25 [2.1.6.4] USE="(ipc%*) -python3%"
*** Portage will stop merging at this point and reload itself,
then resume the merge.
[blocks B ] <sys-apps/portage-2.1.9 ("<sys-apps/portage-2.1.9" is blocking dev-lang/python-2.6.6-r2)
[blocks B ] app-admin/eselect-news ("app-admin/eselect-news" is blocking app-admin/eselect-1.2.11)
* Error: The above package list contains packages which cannot be
* installed at the same time on the same system.
For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):
http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked
!! Emerge failed.
!! Note the error(s) above then press enter to continue.

After "eselect profile set 1", the warnings about having a deprecated profile go away but the same blockage remains: